php-pear-HTML_CSS can optionally use package "php-pear-PEAR"
php-pear-HTML_CSS can optionally use package "php-pear-Services_W3C_CSSValidator" (version >= 0.1.0)
php-pear-HTML_CSS can optionally use package "channel://pear.phpunit.de/PHPUnit" (version >= 3.2.0)
